I have an rattling noise when I shut the car off, but dont hear it when clutch is depressed (throwout bearing??). And can hear it when I start it in the mornings at idle, but for a brief moment. When i drive off, or rev engine it goes away and doesnt return. Is it the dual-flywheels??Clutch (throwout bearing)?? Help please. BTW I reported it during my manufacture warranty. . . they couldnt find the problem, now in CPO (66,000 miles), and pretty sure they'll find the problem. Cass 2003 330i ZHP
Not the first time I've heard of it. http://www.lscbmwcca.org/forum/Topic4450-9-1.aspx?Highlight=clutch
Could be the infamous Vanos rattle - http://forum.e46fanatics.com/showthread.php?t=480309&highlight=rattle, search bimmerfest, too for discussions.
